/* ============================================
   OVPFH v2.0 - Authentication Modal
   Stadium Lights & Energy Design
   ============================================ */

/* Modal Overlay */
.auth-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: var(--backdrop-blur-md);
    z-index: var(--z-modal-backdrop);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    animation: fadeIn var(--duration-base) var(--ease-out);
}

.auth-modal-backdrop.hidden {
    display: none;
}

/* Modal Container */
.auth-modal {
    position: relative;
    max-width: 480px;
    width: 100%;
    background: var(--bg-secondary);
    border: 2px solid var(--color-cyan-500);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl), var(--glow-cyan);
    animation: scaleIn var(--duration-base) var(--ease-out);
    overflow: hidden;
}

/* Decorative Header Accent */
.auth-modal::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-energy);
    animation: gradientShift 3s ease infinite;
    background-size: 200% 200%;
}

/* Modal Header */
.auth-modal-header {
    padding: var(--space-8) var(--space-8) var(--space-6);
    text-align: center;
    position: relative;
}

.auth-modal-title {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    color: var(--color-cyan-500);
    margin-bottom: var(--space-2);
    letter-spacing: var(--tracking-wide);
}

.auth-modal-subtitle {
    color: var(--text-secondary);
    font-size: var(--text-sm);
}

/* Close Button */
.auth-modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: var(--text-2xl);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.auth-modal-close:hover {
    background: var(--bg-elevated);
    color: var(--color-cyan-500);
    transform: rotate(90deg);
}

/* Tabs */
.auth-tabs {
    display: flex;
    gap: var(--space-2);
    padding: 0 var(--space-8);
    border-bottom: 2px solid var(--border-primary);
}

.auth-tab {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
    cursor: pointer;
    position: relative;
    transition: all var(--transition-fast);
}

.auth-tab:hover {
    color: var(--text-primary);
    background: rgba(0, 240, 255, 0.05);
}

.auth-tab.active {
    color: var(--color-cyan-500);
}

.auth-tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-cyan);
}

/* Modal Body */
.auth-modal-body {
    padding: var(--space-8);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.auth-form.hidden {
    display: none;
}

/* Form Group */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-label {
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    color: var(--text-primary);
}

.form-label .required {
    color: var(--color-live);
}

/* Input Wrapper (for password toggle) */
.input-wrapper {
    position: relative;
}

.form-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-base);
    color: var(--text-primary);
    background: var(--bg-elevated);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-cyan-500);
    box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.1);
}

.form-input.error {
    border-color: var(--color-error);
}

.form-input::placeholder {
    color: var(--text-tertiary);
}

/* Password Toggle */
.password-toggle {
    position: absolute;
    right: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: var(--space-2);
    font-size: var(--text-lg);
    transition: color var(--transition-fast);
}

.password-toggle:hover {
    color: var(--color-cyan-500);
}

/* Error Message */
.form-error {
    font-size: var(--text-xs);
    color: var(--color-error);
    margin-top: var(--space-1);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.form-error::before {
    content: '⚠';
    font-size: var(--text-sm);
}

/* Success Message */
.form-success {
    font-size: var(--text-sm);
    color: var(--color-success);
    padding: var(--space-3) var(--space-4);
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid var(--color-success);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.form-success::before {
    content: '✓';
    font-size: var(--text-lg);
}

/* Submit Button */
.auth-submit {
    width: 100%;
    padding: var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: var(--weight-bold);
    background: var(--gradient-cyan);
    color: var(--color-navy-950);
    border: 2px solid var(--color-cyan-500);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.auth-submit:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--glow-cyan);
}

.auth-submit:active:not(:disabled) {
    transform: translateY(0);
}

.auth-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Loading State */
.auth-submit.loading::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(10, 14, 39, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-submit.loading .spinner-small {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--color-white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Divider */
.auth-divider {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin: var(--space-6) 0;
    color: var(--text-tertiary);
    font-size: var(--text-sm);
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-primary);
}

/* Google Button */
.google-signin {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
    background: var(--color-white);
    color: var(--color-navy-950);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
}

.google-signin:hover:not(:disabled) {
    border-color: var(--color-cyan-500);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.google-signin:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.google-icon {
    width: 20px;
    height: 20px;
}

/* Facebook Button */
.facebook-signin {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
    background: #1877F2;
    color: #fff;
    border: 2px solid #1877F2;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    margin-top: var(--space-3);
}

.facebook-signin:hover:not(:disabled) {
    background: #166FE5;
    border-color: #166FE5;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.facebook-signin:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.facebook-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* Forgot Password Link */
.forgot-password {
    text-align: right;
    margin-top: calc(var(--space-2) * -1);
}

.forgot-password a {
    color: var(--color-cyan-500);
    font-size: var(--text-sm);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.forgot-password a:hover {
    color: var(--color-cyan-400);
    text-decoration: underline;
}

/* Terms Checkbox */
.form-group-checkbox {
    margin-top: 16px;
    margin-bottom: 8px;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    user-select: none;
}

.form-checkbox {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.checkbox-custom {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    border: 2px solid #3f3f46;
    border-radius: 4px;
    background: #27272a;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 1px;
}

.checkbox-custom::after {
    content: '\2713';
    font-size: 14px;
    font-weight: bold;
    color: #00f0ff;
    opacity: 0;
    transform: scale(0);
    transition: all 0.15s ease;
}

.form-checkbox:checked + .checkbox-custom {
    border-color: #00f0ff;
    background: rgba(0, 240, 255, 0.15);
}

.form-checkbox:checked + .checkbox-custom::after {
    opacity: 1;
    transform: scale(1);
}

.form-checkbox:focus + .checkbox-custom {
    border-color: #00f0ff;
    box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.2);
}

.checkbox-text {
    font-size: 14px;
    color: #a1a1aa;
    line-height: 1.5;
}

.terms-link {
    color: #00f0ff;
    text-decoration: none;
    transition: color 0.15s ease;
}

.terms-link:hover {
    color: #67f3ff;
    text-decoration: underline;
}

/* Terms Notice */
.terms-notice {
    font-size: 12px;
    color: #71717a;
    text-align: center;
    line-height: 1.5;
    margin-top: 8px;
    margin-bottom: 16px;
}

.terms-notice a {
    color: #00f0ff;
    text-decoration: none;
    transition: color 0.15s ease;
}

.terms-notice a:hover {
    color: #67f3ff;
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 640px) {
    .auth-modal {
        max-width: 100%;
        margin: var(--space-4);
    }

    .auth-modal-header,
    .auth-modal-body {
        padding: var(--space-6);
    }

    .auth-tabs {
        padding: 0 var(--space-6);
    }
}